The boigas system
basically comprises of the collection and processing of cattle dung, production
and delivery of biogas and handling and application of the digested slurry
in agricultural fields. The production process involves the mixing of wet
cattle dung with an equal quantity of water and then it is put in the biogas
plant where it is retained for some time for digestion in the absense of
air.The gas thus produced has around 55 to 75 % methane which is inflammable.
This is then collected and piped to the kitchen.When this gas is burnt
in silk mantles, it serves as a source of light.It can also be used in
dual-fuel engines for motive power and generation of electricity.
Three basic
designs of biogas plants have been developed, namely, the Fixed Dome Deenbandhu
Model, the Floating Gas Holder KVIC (Khadi and Village Industries Commission)
model and the Bag Type Digester which are promoted under two projects -
National Project on Biogas Development(NPBD) which promotes biogas plants
for household use, and the other the Community, Institutional and Night-Soil
based biogas plants programme which aims at promoting biogas plants for
the community and institutional levels.
